I have started this project, and I thin i have a problem with the programing part.So belove you can check out my code. The problem is when I put a little delay(e.g. 1 to 10) the LEDs brightness is low, and they start to blink at one point. Also if the value is high like in this code, the brightness is ok, but of course i don't have the continuos "flow" to get for example the letter A. My goal is to display a letter with no blinking and good brightness.(The pins are correctly mounted, i checked several times, also i have a basic setup 8x8 Led matrix, with comon catodhe setup, each anode coloumn beeing protected by a 220 ohm resistor)

Increase the cycle time, and decrease the current limit resistor. Thus you cycle thru the LEDs faster, but they are brighter when they are on. Check the datasheet for the part, see how long each can be on when pulsed, and what the pulse current can be.